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Inclined Plane Bridge
The Inclined Plane Bridge is a , Pennsylvania through truss bridge that spans Stonycreek River in Johnstown, Cambria County, in the U.S. state of Pennsylvania. It connects the city to the lower station of the Johnstown Inclined Plane. The bridge was listed on the National Register of Historic Places in 1988 and was documented by the Historic American Engineering Record (HAER) in 1997. History On May 31, 1889, the South Fork Dam on the Little Conemaugh River, upstream of Johnstown, collapsed. The resulting deluge devastated the city, killing over 2,000 people. As the city rebuilt, the Cambria Iron Company started work on a residential development atop Yoder Hill, overlooking the city. To provide easy transportation across the steep slope for the residents of the new community of Westmont, as well as to function as an escape route for future floods, the company opted to construct the Johnstown Inclined Plane, a funicular. A bridge had to be built to connect Johnstown to the l ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cambria County, Pennsylvania
Cambria County is a county in the Commonwealth of Pennsylvania. As of the 2020 census, the population was 133,472. Its county seat is Ebensburg. The county was created on March 26, 1804, from parts of Bedford, Huntingdon, and Somerset Counties and later organized in 1807. It was named for the nation of Wales, which in Latin is known as "Cambria". Cambria County comprises the Johnstown, PA Metropolitan Statistical Area, which is also included in the Johnstown-Somerset, PA Combined Statistical Area. Geography According to the U.S. Census Bureau, the county has a total area of , of which is land and (0.8%) is water. Cambria has a warm-summer humid continental climate (''Dfb'') and average monthly temperatures in downtown Johnstown range from 27.8 °F in January to 71.0 °F in July, while in Ebensburg they range from 23.9 °F in January to 67.7 °F in JulyPRISM Climate Group, Oregon State U Adjacent counties *Clearfield County (north) * Blair County (east) ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Westmont, Pennsylvania
Westmont is a borough in Cambria County, Pennsylvania, United States. It is part of the Johnstown, Pennsylvania Metropolitan Statistical Area. The population was 5,181 at the 2010 census, down from 5,523 at the 2000 census. Geography Westmont is located in southwestern Cambria County and is bordered to the east by the city of Johnstown, to the north by the borough of Brownstown, and to the south by the borough of Southmont and the unincorporated community of Elim. Westmont sits on heights rising up to above the Stonycreek and Conemaugh River valleys in the center of Johnstown. According to the United States Census Bureau, the borough of Westmont has a total area of , all land. History Before the Johnstown Flood of 1889, the Yoder Hill area consisted of nothing more than a few farms, accessible by only a few steep, muddy roads. However, since the flood was so devastating to the city and to its major employer, the Cambria Iron Company, the iron company decided to develop the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
National Register Of Historic Places Listings In Cambria County, Pennsylvania
This is a list of the National Register of Historic Places listings in Cambria County, Pennsylvania. This is intended to be a complete list of the properties and districts on National Register of Historic Places in the Cambria County, Pennsylvania. The locations of National Register properties and districts for which the latitude and longitude coordinates are included below, may be seen in a map. There are 31 properties and districts listed on the National Register in the county. Two sites are further designated as National Historic Landmarks and another is designated as a National Memorial. Current listings See also * List of Pennsylvania state historical markers in Cambria County References {{Cambria County, Pennsylvania Cambria County Cambria County is a county in the Commonwealth of Pennsylvania. As of the 2020 census, the population was 133,472. Its county seat is Ebensburg. The county was created on March 26, 180 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Bridges Documented By The Historic American Engineering Record In Pennsylvania ...
__NOTOC__ This is a list of bridges documented by the Historic American Engineering Record in the U.S. state of Pennsylvania. Bridges See also * List of tunnels documented by the Historic American Engineering Record in Pennsylvania Notes References External links {{HAER list, structure=bridge *List *Bridges Pennsylvania Bridges Bridges A bridge is a structure built to span a physical obstacle (such as a body of water, valley, road, or rail) without blocking the way underneath. It is constructed for the purpose of providing passage over the obstacle, which is usually someth ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Bridges On The National Register Of Historic Places In Pennsylvania
This is a list of bridges and tunnels on the National Register of Historic Places (NRHP) in the U.S. state of Pennsylvania. Covered bridges on the NRHP in Pennsylvania are listed List of covered bridges on the National Register of Historic Places in Pennsylvania, elsewhere. Current listings Former listings External linksHistoric Covered Bridges of Pennsylvania References {{DEFAULTSORT:List Of Bridges On The National Register Of Historic Places In Pennsylvania Bridges on the National Register of Historic Places in Pennsylvania, Lists of bridges on the National Register of Historic Places by state, Pennsylvania Pennsylvania transp ...[...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Polygonal
In geometry, a polygon () is a plane figure that is described by a finite number of straight line segments connected to form a closed ''polygonal chain'' (or ''polygonal circuit''). The bounded plane region, the bounding circuit, or the two together, may be called a polygon. The segments of a polygonal circuit are called its '' edges'' or ''sides''. The points where two edges meet are the polygon's '' vertices'' (singular: vertex) or ''corners''. The interior of a solid polygon is sometimes called its ''body''. An ''n''-gon is a polygon with ''n'' sides; for example, a triangle is a 3-gon. A simple polygon is one which does not intersect itself. Mathematicians are often concerned only with the bounding polygonal chains of simple polygons and they often define a polygon accordingly. A polygonal boundary may be allowed to cross over itself, creating star polygons and other self-intersecting polygons. A polygon is a 2-dimensional example of the more general polytope in any numbe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pratt Truss
A truss bridge is a bridge whose load-bearing superstructure is composed of a truss, a structure of connected elements, usually forming triangular units. The connected elements (typically straight) may be stressed from tension, compression, or sometimes both in response to dynamic loads. The basic types of truss bridges shown in this article have simple designs which could be easily analyzed by 19th and early 20th-century engineers. A truss bridge is economical to construct because it uses materials efficiently. Design The nature of a truss allows the analysis of its structure using a few assumptions and the application of Newton's laws of motion according to the branch of physics known as statics. For purposes of analysis, trusses are assumed to be pin jointed where the straight components meet, meaning that taken alone, every joint on the structure is functionally considered to be a flexible joint as opposed to a rigid joint with strength to maintain its own shape, and th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Truss
A truss is an assembly of ''members'' such as beams, connected by ''nodes'', that creates a rigid structure. In engineering, a truss is a structure that "consists of two-force members only, where the members are organized so that the assemblage as a whole behaves as a single object". A "two-force member" is a structural component where force is applied to only two points. Although this rigorous definition allows the members to have any shape connected in any stable configuration, trusses typically comprise five or more triangular units constructed with straight members whose ends are connected at joints referred to as ''nodes''. In this typical context, external forces and reactions to those forces are considered to act only at the nodes and result in forces in the members that are either tensile or compressive. For straight members, moments (torques) are explicitly excluded because, and only because, all the joints in a truss are treated as revolutes, as is necessary for ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wrought Iron
Wrought iron is an iron alloy with a very low carbon content (less than 0.08%) in contrast to that of cast iron (2.1% to 4%). It is a semi-fused mass of iron with fibrous slag Inclusion (mineral), inclusions (up to 2% by weight), which give it a wood-like "grain" that is visible when it is etched, rusted, or bent to structural failure, failure. Wrought iron is tough, malleable, ductile, corrosion resistant, and easily forge welding, forge welded, but is more difficult to welding, weld electrically. Before the development of effective methods of steelmaking and the availability of large quantities of steel, wrought iron was the most common form of malleable iron. It was given the name ''wrought'' because it was hammered, rolled, or otherwise worked while hot enough to expel molten slag. The modern functional equivalent of wrought iron is Carbon steel#Mild or low-carbon steel, mild steel, also called low-carbon steel. Neither wrought iron nor mild steel contain enough carbon to be ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stringer
Stringer may refer to: Structural elements * Stringer (aircraft), or longeron, a strip of wood or metal to which the skin of an aircraft is fastened * Stringer (slag), an inclusion, possibly leading to a defect, in cast metal * Stringer (stairs), the structural member in a stairway that supports the treads and risers * Stringer (surfing), a thin piece of wood running from nose to tail of a surfboard Other uses * Stringer (name), includes a list of people with the name * Stringer (journalism), a type of freelance journalist * Stringer, Mississippi, an unincorporated community * Fish stringer, a piece of cord or chain used to keep fish alive and secured while an angler continues fishing * The Stringers, nickname of Hailsham Town F.C., English football club See also * Stranger (other) * Strenger Strenger is a surname. Notable people with the surname include: * Carlo Strenger (1958–2019), Swiss-Israeli psychologist, philosopher, existential psychoanalyst, and public int ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Works Progress Administration
The Works Progress Administration (WPA; renamed in 1939 as the Work Projects Administration) was an American New Deal agency that employed millions of jobseekers (mostly men who were not formally educated) to carry out public works projects, including the construction of public buildings and roads. It was set up on May 6, 1935, by presidential order, as a key part of the Second New Deal. The WPA's first appropriation in 1935 was $4.9 billion (about $15 per person in the U.S., around 6.7 percent of the 1935 GDP). Headed by Harry Hopkins, the WPA supplied paid jobs to the unemployed during the Great Depression in the United States, while building up the public infrastructure of the US, such as parks, schools, and roads. Most of the jobs were in construction, building more than 620,000 miles (1,000,000 km) of streets and over 10,000 bridges, in addition to many airports and much housing. The largest single project of the WPA was the Tennessee Valley Authority. At its peak ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pittsburgh Flood Of 1936
On March 17 and 18, 1936, the city of Pittsburgh, Pennsylvania, witnessed the worst flood in its history when flood levels peaked at . This flood became known as The Great St. Patrick’s Day flood, and also affected other areas of the Mid-Atlantic on both sides of the Eastern Continental Divide. Flood control Civic organizations in the city, with financial backing from the City of Pittsburgh, Allegheny County and the Chamber of Commerce had been asking the Federal Government for help with flood control for almost thirty years. They had formed committees to lobby government officials and found themselves caught in political processes that ultimately resulted in the city and its residents sustaining devastating damage. In August 1935, the United States House of Representatives passed a bill for nine flood control reservoirs to be built above Pittsburgh. However, while the Senate debated this bill, the tremendous 1936 flood occurred. The Congress did not actually appropriate an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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